#define _CRT_SECURE_NO_WARNINGS 1
class Solution {
public:
    bool isInterleave(string s1, string s2, string s3) {
        int m = s1.size(), n = s2.size();
        if (m + n != s3.size()) return false;
        s1 = " " + s1;
        s2 = " " + s2;
        s3 = " " + s3;
        vector<vector<bool>> dp(m + 1, vector<bool>(n + 1));
        dp[0][0] = true;
        for (int i = 1;i <= n;i++)
        {
            if (s2[i] == s3[i]) dp[0][i] = true;
            else break;
        }
        for (int i = 1;i <= m;i++)
        {
            if (s1[i] == s3[i]) dp[i][0] = true;
            else break;
        }
        for (int i = 1;i <= m;i++)
        {
            for (int j = 1;j <= n;j++)
            {
                dp[i][j] = (s1[i] == s3[i + j] && dp[i - 1][j]) || (s2[j] == s3[i + j] && dp[i][j - 1]);
            }
        }
        for (int i = 0;i <= m;i++)
        {
            for (int j = 0;j <= n;j++)
            {
                cout << dp[i][j] << " ";
            }
            cout << endl;
        }
        return dp[m][n];
    }
};